1. Where can I learn more about the toolkit?
2. Which platforms are supported?
Windows and Linux
3. What is the impact of PMI on performance?
4. Can it be used for Monitoring ?
No it should not be used for Monitoring. The objective is tuning and not system monitoring
5. I am unable to run it on Linux.
See this: http://www.ibm.com/developerworks/forums/thread.jspa?threadID=459606&tstart=0
6. I am unable to connect to host/I get the error: "Monitor is terminated, because no server is started in this cell now!"
Please ensure that you connect to the SOAP port of the deployment manager of the cell. (SOAP_CONNECTOR_ADDRESS of the dmgr)